Roof construction.



C. R. NEILL AND E. T. GATRELL.

Hoof CONSTRUCTION.

APLCATION FILED MAY I6. |918. 1,316,968. lntoniodsvpr. 225, "1919.

jgul. v mw STATES PATENT OFFICE.

CHARLES-Rh IiTIElIlll'JI AND EDWARD T. GATRELL, OF TULSA, OKLAHOMA.

, ROOF CONSTRUCTION.

-provements 1n Roof Constructions, of which theiollowing is aspecification.

Thisinvention relates to roof constructions andit comprises a roof for atank or j the like niade of sectionsof metal crimped joint comprlsingor'lts e ulvalent and' hooked along their edges and soldered to eachother the roof being placed upon the tank or other structure with aloose connection therebetween, said roof being sealed to the side of thetank by an expansible member or expansion joint, the expansion acontinuous strip of lead and being secured to the upper e ge of thetank; all las more fully hereinafter set forth and as claimed.

In constructing a tank to hold oils and other liquids, it is desirableto provide a leak-proof-'connecton or sealing member between the ,tankand its roof and it is also necessary to provide for the expansion andcontractlon of the metal due to changes in temperature.l In priorconstructions of this character attempts have been made to construct atank whlch is leak-proof,but in such constructions no allowance was madefor the expansion and contraction of the parts. In any constructionwhere the edge of a tank roof 1s secured directly to thetank or isindirectly secured to the tank through the use of some rigid element,the desired result. is

not obtained. In veryhot weather the roof expands to such a degree thatit is apt to open a seam and in colder weather it may contract to suchan extent as to break the connection between the roof and the tank. Insome construotionsprovision has been made' for expansion and contractionbut without securing a leak-proof or hermetically sealing connection.

In the present invention we provide` a tank with a roof the medium of a{iexi'ble expansion ]o1nt which permits expansion and contraction of thevarious elements, and at the same time,

we provide a construction which is entirely leak-proof. When used on anoil tank, this construction prevents the escape of gases and va ors andprevents inflow of air into the tank. r

In the present construction a, continuous Specification of LettersPatent.

secured to the tank through y expansion strip of lead is secured to theedge of the roof, and the shell of the tank is provided with an angleiron at its upper edge, 'the expansion strip embracing the angle ironand being secured to the shell of the tank.

In the accompanying drawings we'have shown several advantageousembodiments of this invention. In this, showing- Figure 1 is a partialplan view of a roof lonstructed in accordance with our invenion;

Fig. 2 is a vertical section taken on the line 2 2 of Fig. 1 showing theexpansion strIip made of lead; and

1g. 3 1s a similar view showing-,an expanslon strip made of corrugatedtin. :jg

In the accompanying drawings'letter'A designates the tank as a whole. Itis provided with a roof B. The roof as shown consists of a-plurality ofsections 1 which are crlmped along their edges and hooked to E eachother. Solder may be employed to insure perfect joint between thesections. The tank is provided with the usual rafters 2 for supportingthe roof and a sheathing of wooden strips 3 which rests upon the raftersand forms a foundation for the roof. Angle iron 4 is secured to theshell of the tank at its upper edge. The roof is not connected rlgldlyto the shell of the tank or to the angle iron carried at the top of thetank, but is provided with an expansion strip 5 by means of which aflexible connection is made. In Fig. 2 the expansion strip is shown madeof sheet lead and in Fig. 3 the expansionv strip 5 is made of corrugatedtin. Other sultable matter, such' as fabric water-proofed with flexibleoil-proof mater1al such as chromated glue, viscose cellulose, etc., maybe employed for this purpose. .The expansion strip is soldered to theedge of the roof at 6 and extends over the outer edge of the angle iron,embracing the angle iron and 4is secured to the shell of the tankbetween the tank and the vertical leg .of the angle iron b bolt 7.Rivets or bolts may be employed or this purpose, and the expansion stripmay be calked on top between the angle iron and the shell. y

When a roof of this character has lbeen assembled, the connectionbetween the tank and the roof is leak-proof, and if'the'tank containsvolatile liquids the escape of vapors and gases is prevented. Any inflowof air is also prevented. As the roof is not rigidly Patented Sept. 23,1919.

' Application med my 1e, 191s. serial No. 235,001.

climate, even where it will 'be subjected to marked changes inltemperature. When the expansion strip is made'of lead or other metal, anebrcellent lightning arrester is provided. If. a -bolt of lightningshould hit the roof of the tank, it would pass through the metalexpansion strip and down the metal side of -the tank Vto the ground.

What we claim "is 1. A roof for storage tanks and the like comprising aInetal covering for the tank, an angle iron secured to the edge of thetank at "tle rtop thereof, with a loose connection between said metalcovering and l said angle Iron, an expansion strip of ilexible metalsecured to the edge of the roof, said expansion strip embracing saidangle iron and being secured to the shelly of the tank. v g A 2. Aroofforstorage tanks and the like comprising a metal covering for thetank, with a loose connection between said metal images covering'- andsaid tank, an expansion strip of exible metal secured to the/metalcovering, and to the tankIi said strip forming a' leak-proof connectionbetween the tank and the roof, and permitting expansion and contractionof the same.

3. A roof for storage tanks and the like comprising a'metal covering forthe tank, an angle 'iron secured to the edgeofthe tank at the topthereof, with a loose 'connection between said metal covering andA saidangle iron, an expansion strip of lead secured to the edge of the roof,said expansion strip embracing said angle iron and being secured to theshell of the tank.

4. A roof for storage tanks and the like comprising a metal covering forthe tank,

with a loose connection between Said metal covering and said tank anexpansion strip of lead secured to the metal covering, and to the tank,said strip forming a leak-proof` connection between the tank and theroof,

and permitting expansion and contraction of` the same. Y

'In testimony whereof, we aiiix our signatures hereto.

*CHARLES R. NEILL.

EDARD T. GATRELL.

